I am planning to construct a bridged Gainklone. I want to minimize the parts count. The circuit attached is loosely based on National BP-200. I have omitted the buffering amp and a few caps. The values of the resistors are also changed.

As an inverting or non inverting amp, the circuit works, but I do not know if I can combine them in this way. I am a bit worry about loading the source too much, as there is not buffering amp.